Rebuilt questions/answers for 7 Bolt DSM

[bouncer07]

I have a late 2G (1998) dsm and with 150,000 miles on this car and still running. No sign of crankwalk and did a leak down test which my motor is still in great shape. I know the theory in crankwalk works but mine has just been good to me. Instead of moving to a 91-94 6 bolt motor, i want to rebuilt my engine so what is your best bet to insure a long lasting 7 bolt w/o bearings or crank issues? Have anyone is this forum done a 7 bolt crank nitrided and added new bearings? In my opinion, cryo treating the crank is good too but i think nitriding is my best bet. Throw me some Q's+A's, before i start my engine rebuilt this spring!

side notes (have supporting mods)
past turbo's installed
I had run on 16G for (50,000 miles) on 15 pounds
20G turbo (3,000 miles) 18 pounds

I'm currently running the SBR G50 turbo in my car for 10 miles now and not much abuse was pushed on my 150,000 mile motor on all the turbos.

This post is for the rebuilt, suggestions, and past experiences. Thanks.

[Shane@DBPerformance]

Don't rebuild it, if it's in good shape.

[MustGoFaster]

I'm with Shane.

[JET]

Yep, I am with them. If you rebuild it you will likely have more problems than just leaving it alone. Run her until she blows!

[Pushit2.0]

Your motor has the revised thrust bearing setup that uses thrust washers, 2 half's just in the block, nothing in the main girdle. Keep up on your oil changes and use a Wicks or similar filter and the car should last a while longer yet, no need to "build" a motor unless you plan to make tons of power.

~John

[bouncer07]

yeah, good points.

[iceminion]

Instead of moving to a 91-94 6 bolt motor, i want to

Not trying to be a dick.....but the 6-bolt was only available from 89-92.5.

Just trying to keep the correct facts circulating.

As for your car, I would find a cheap 6-bolt and start building it up. Currently, it sounds like you should just leave your engine alone, eventually you will want more.

It can't hurt to have a built shortblock built and ready to install ready in your garage.

Its better to be ready to before hand. 4g63's can last a long time, but seals, and rings do wear out eventually.

[Kracka]

If it runs well and still shows good compression #'s there is no reason to rebuild it unless you suspect other problems or are going for a ton of power.

[bouncer07]

7 bolt motors can hold just as much boost as a 6 bolt. I like the 7 bolt for many reasons for a FWD.If it was AWD, yeah.. i'd swap into a 1G no problem. But being a FWD, 400hp is where i will stop at.

[RichardBBY]

sorry for my ignorance, i'm not vary familar with early DSMs, but why would a 6 bolt be better for AWD then a 7 bolt?